1 .
Once upon a time*, in an age before SatNav, travellers by road or on foot who were looking for a village (nestled in the hills &/or forest, perhaps) would know where or when to look out for it by recognising the Ordnance Survey map symbol for the church building at the likely heart of it, and watching for that to appear against the actual skyline.
The symbol for a small chapel (such as a nonconformist one) would be a small plain black cross, but for a church as such, there would be another shape underneath the cross. What was the 'code' for recognising these at a distance?
(* Way back in the 20th century, before you were born ~ if you are a potential GCSE candidate in or beyond the '20-teens'!)
A round base meant a church with a tower; a square base meant a church with a spire or steeple
A round base meant a church with a spire or steeple; a square base meant a church with a tower
A triangular base meant a church with a spire or steeple; a square base meant a church with a tower
A triangular base meant a church with a tower; a square base meant a church with a spire or steeple